Turbobike Web Site www.Turborick.com
I say keep gearing it taller until you don't need anymore of can't gear it taller. Of course, there are limits for street use. It's a bitch around town if 1st is good for 130mph. I geared the FJ 18/38 (compared to 17/42 stock) and it's great with the big displacement (1314cc). The turbo spools up even faster when you load it like that - it makes boost at 4000 rpm in 1st gear. With the stock rev limiter in place that's still only good for about 185 mph actual since those bikes were only good for 150mph stock. You do notice that there is a minimum cruising speed in town due to the overly tall gearing, but it's not really much of an annoyance. I left the gearing alone on the ZX-11 (so far) since I knew if I had it I'd use it, and that's fast enough on the roads we have in Michigan, I think. It's still enough to use all of the 200mph speedo (probably an actual 180+mph) Now if I lived in Wyoming or something..... Bob GSXRTurbo1@aol.com on 08/06/99 05:15:36 PM To: Turbobike@natvideo.com cc: GSXRTurbo1@aol.com (bcc: Bob Shammas/EQA/Nsk-Corp) Subject: Re: [turbobike] Sound I have an 86 GSXR1109 with a Mr Turbo draw thru 42mm Mikuni HSR carb. With the supplied exhaust w/cannister it is fairly quiet. However, with a "banana pipe" it is EXTREMELY loud. It also has a sound like a 4cyl car without a muffler, it doesn't sound like a bike at all. I thought it would quiet down somewhat when I installed my JE 9:1 pistons, but it is just as loud. I guess its not the compression ratio making it loud. I also run a 2 1/2" pipe to a 4" super trapp baffle (its just the disks without the cannister or packing, pretty trick actually) and that quiets it down somewhat, but still nowhere near as quiet as the Mr Turbo supplied cannister. The only problem with the Mr Turbo cannister is that its too restrictive. My EGT's are noticably higher with that exhaust in place. I went for a ride today with the stock gearing, was on I-75 in 3rd gear going about 70-80 mph and nailed it. 2 quick upshifts and what seemed like a few seconds and I tagged the rev limiter (set at 11,000 on my Dyna 2000), glanced at the speedo at it read about 150 mph. It seemed low to be tagging the limiter, but I know the clutch wasn't slipping as I have a MRE lockup. What do the rest of you use for gearing? Gearing for top end v.s. 1/4 mile? Any comments/suggestions?